Photomultiplier tube



FIG. 1 is a front view of a photomultiplier tube for use in a measuring device of an oil drilling rig.

FIG. 2 is a rear view of the photomultiplier tube.

FIG. 3 is a top view of the photomultiplier tube.

FIG. 4 is a bottom view of the photomultiplier tube.

FIG. 5 is a right side view of the photomultiplier tube.

FIG. 6 is a left side view of the photomultiplier tube.

FIG. 7 is a perspective view showing the left side of the photomultiplier tube; and,

FIG. 8 is a perspective view showing the right side of the photomultiplier tube. 

CLAIM The ornamental design for a photomultiplier tube, as shown and described. 